body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

a {
  color: #00B7FF;
}
body {
  box-sizing: border-box;
}

.container {
  margin: 0 auto;
  width: 600px;
  display: flex;
  justify-content: left;
  height: 100vh;

}

ul {
  list-style-type: none;
  padding-left: 0;
}

li {
  padding: 8px;
}

.left {
  width: 100px;
}

.left ul {
  font-weight: bold;

}

.left ul li {
  border-left: 4px solid white;
}

.left ul li:hover {
  color: #4d90fe;
  cursor: pointer;
}

.title {
  font-weight: bold;
  position: relative;
  display: inline-block;
  padding-left: 0;
}

.title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 90%;
  border-bottom: 4px solid salmon;
}

.left ul li.activate {
  border-left: 4px solid salmon;
}

.right {
  width: 100%;
}

.right>div {
  display: none;
}

.right .sub-activate {
  display: block;
}


.info {
  padding-left: 0;
}

.downloading .info span {
  display: inline-block;
  text-align: center;
  vertical-align: middle;
}

.downloading .info span:nth-child(1) {
  text-align: left;
  width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.downloading .info span:nth-child(2) {
  width: 100px;
  color: green;
}

.downloading .info span:nth-child(3) {
  width: 100px;
  color: red;
}

.downloading .info span:nth-child(4) {
  width: 100px;
  color: #4d90fe;
}

.downloading .info span:nth-child(4):hover {
  cursor: pointer;
}


input[type="text"] {
  padding: 4px 8px;
  border: 2px solid #ddd;
  border-radius: 5px;
  font-size: 16px;
  background-color: #fff;
  color: #333;
  box-sizing: border-box;
  transition: all 0.3s ease;
}

input[type="text"]:focus {
  border-color: #4d90fe;
  box-shadow: 0 0 8px rgba(77, 144, 254, 0.5);
  outline: none;
}


input[type="text"]::placeholder {
  color: #888;
  font-style: italic;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: 0.4s;
  border-radius: 50px;
}

.slider:before {
  content: "";
  position: absolute;
  height: 26px;
  width: 26px;
  border-radius: 50%;
  background-color: white;
  left: 4px;
  bottom: 4px;
  transition: 0.4s;
}

input:checked+.slider {
  background-color: #4d90fe;
}

input:checked+.slider:before {
  transform: translateX(26px);
}

.setting .info {
  display: flex;
  justify-content: left;
  align-items: center;
}

.setting .info > input{
  margin: 0 20px;
}

.setting .info span:nth-child(1){
  display: inline-block;
  width: 120px;
}